Pencil-sharpening machine



(No Model.)

W. H. LAMSON.

V PENCIL SHARPENING MACHINE.

No. 317,550. Patented May 12, 1885.

WITNESSES,"

u. PETERS. PhokvL'nholrapben Washington.

UNITED STATES PATENT OFFICE.

WARREN H. LAMSON, OF LYNN, MASSACHUSETTS.

PENCIL-SHARPENING MACHINE.

QPElCIFI()1-.'J?ION forming part of Letters Patent No. 317,550, dated May 12, 1885.

Application filed September 29, 1884. (No model.)

V of Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented certain Improvements in Pencil Sharpening or Pointing Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to mechanism for pointing pencils, .and has for its object to produce means for manipulating the ordinary pencil-sharpener so as to sharpen the pencil quickly, neatly, and without danger of breaking or damaging the pencil-lead; and the invention consists in the parts hereinafter described,and specifically pointed out in the claims.

In the drawings, Figure 1 is a perspective view of one side and end of the complete mechanism embodying my invention. Fig. 2 is a vertical longitudinal section of the pencilpointer and its compound flexible carryingshaft and the guiding-plate.

The working parts of the machine are supported by an ornamental frame-work. (Designated in the drawings by the letters A.) At one end of said frame is the circular plate B, attached to the frame by screw a, the plate being allowed to turn on theshank of the screw. Said plate is provided with small holes I), of different sizes, to permit the introduction therein of different pencils, and either of said holes I) may be successively brought into position to register with the opening in the pencil-sharpener by simply turning the plate on its supporting pin or screw a. Said plate B is also provided with a series of small cavities, or, adapted to receive the end of pin h, and so located on the plate that some one of said cavities will register with the pin it whenever one of the holes I) is in line with the pencil-sharpener. In such position a washer, t, composed of rubber or other suitable material ,arranged, as shown, between the plate and the end of its supporting-screw a, will operate to push forward the plate and force the pin h to enter one of said cavities, and the pin, being cast upon or otherwise secured to the frame at this point,will hold the plate B until it is pressed backward against the action of the washer, for the purpose of bringing some other of the holes b into line with the sharpener.

In operation, the pencil to be pointed is passed through the proper hole in plate B,and is thereby guided into the sharpener. The hand holding the pencil may be allowed to rest on the plate and the frame-work at this point, and will be thereby relieved in its work of steadying and'fmoving forward the pencil. The sharpener O is located in a suitable chuck,H,which is secured by a flexible sleeve, P, to the mandrel D. Said mandrel D isprovided with a fixed gear, 6, that meshes with a larger gear, F, which is journaled by a suitable pin to the frame A, and is'provided with a crank, 8, to which power may be applied for turning the mandrel.

In order to preventbreaking the pencil-lead, I have found it useful to have some flexibility in the tool-carrying shaft, and to this end I employ a flexible sleeve, 1?, composed of rubber or other suitable material. Said sleeve is inade'to receive the end of mandrel D in one end, and in its opposite end is inserted in a similar manner the end of the chuck H. This arrangement brings the end of the chuck and the mandrel in close proximity to each other and in one line, but without any connection except through the flexible sleeve. This sleeve will impart the necessary movement to the chuck, and allows the chuck to move laterally to adapt itself to the slight variations of the pencil. I

I do not regard the sleeve as indispensable; but I prefer to use it, as in this case the same degree of precision is not required in holding the pencil. I am aware, however, that the chuck and mandrel may be formed in one piece, and a machine so constructed in this respect will possess utility.

The sharpener 0 may be of any ordinary construction. The one shown is well known to those skilled in the art, and differs from the ordinary construction only in having its shank or rear end formed to enter the chamber or bore of the chuck H, which is simply a conical circular hole adapted to receive the sharpener and hold it by the friction of simple contact therewith.

I claim and desire to secure by Letters Patcut-- 1. In a pencil-sharpening machine,the combination of the holding-plate B, provided with openings 1) for the pencil, and cavities n,with the frame A, having pin h, said plate being secured to the frame by screw a, and springmeans to revolve the same, substantially as Washer 15, all the parts being arranged and 0pdescribed. eratin subsbantiall as described.

2. 1T1 a pencil-sh rpener, the combination LAMSON 5 0f the chuck H, adapted to hold the sharpener, Vitnesses:

and the mandrel D, secured together by a flexi- GAVIN HOLLIDAY, ble sleeve, P, 130 admit oflateral movement, and C. B. TUTTLE. 

